Dust bag



FIG. 1 is a rear perspective view of a dust bag, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a partial enlarged view of FIG. 1 ; and,

FIG. 9 is a partial enlarged view of FIG. 1 .

The broken lines in the drawings illustrate the portions of the dustbag, which form no part of the claimed design.

CLAIM The ornamental design for a dust bag, as shown and described.